IL State Info
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Most Populated Cities in Illinois State starting with the letter O
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City
Population
Growth
Age
Income per household
Orland Park IL
65,619
1%
45.20
$73,499.50
Oak Lawn IL
56,946
0%
20.60
$23,764.50
Oak Park IL
52,662
1%
28.95
$44,878.25
Oswego IL
36,732
1%
34.60
$70,039.00
O Fallon IL
33,314
5%
36.80
$55,339.00
Oak Forest IL
28,268
1%
37.70
$60,339.00
Ottawa IL
24,681
1%
41.70
$39,228.00
Olney IL
12,083
-1%
42.30
$31,015.00
Oak Brook IL
10,506
5%
57.00
$109,942.00
Oregon IL
6,968
0%
46.60
$42,798.00
Olympia Fields IL
5,032
3%
49.90
$94,394.00
Oglesby IL
4,770
1%
40.90
$36,765.00
Oblong IL
2,957
-7%
43.00
$31,109.00
Orion IL
2,287
-44%
40.50
$52,478.00
Oakwood IL
2,187
-42%
42.50
$41,108.00
Onarga IL
1,759
-8%
37.50
$38,438.00
Okawville IL
1,609
-29%
41.00
$36,906.00
Odin IL
1,586
-31%
43.70
$34,966.00
Oreana IL
1,305
-19%
41.90
$56,653.00
Odell IL
1,259
-20%
41.80
$40,250.00
Ozark IL
1,202
0%
46.50
$28,558.00
Oquawka IL
1,099
-98%
47.50
$33,182.00
Opdyke IL
1,077
-9%
37.20
$38,854.00
Oakland IL
1,055
-55%
47.10
$34,184.00
Orangeville IL
1,013
-41%
43.00
$41,776.00
Oakdale IL
735
0%
44.60
$42,212.00
Omaha IL
650
-5%
46.10
$24,965.00
Ohio IL
645
-51%
42.90
$43,906.00
Ogden IL
625
-107%
39.90
$47,188.00
Olmsted IL
458
-39%
47.30
$26,500.00
Oneida IL
442
-137%
41.90
$45,515.00
Oconee IL
434
0%
40.60
$35,625.00
Owaneco IL
397
-36%
43.80
$47,143.00
Osco IL
253
-38%
42.60
$39,808.00
Oakford IL
244
-117%
42.80
$42,738.00
Olive Branch IL
232
-215%
46.10
$30,833.00
Ophiem IL
121
14%
36.80
$40,750.00
Ohlman IL
0%
49.50
$0.00
Oraville IL
0%
0.00
$0.00
Orient IL
0%
45.20
$14,688.00
Cities in Numbers
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Counties in Numbers
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Zip Codes in Numbers
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